Energy storage performance of hybrid aqueous supercapacitor based on nano-Li2MnSiO4 and activated carbon

Chaturvedi, Prerna; Sil, Anjan; Sharma, Yogesh

doi:10.1007/s11581-016-1683-4

Cited by 11 publications

(3 citation statements)

References 42 publications

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“…We also investigated the effect of MWCNT addition on the electrochemical performance of rGO/MWCNT films in a three-electrode setup with 2 M KOH electrolyte. Figure 8a depicts the CV curves of as-synthesized rGO, GP5C, GP10C, and GP15C film electrodes recorded at a scan rate of 50 mVs −1 in the potential range − 0.9 to 0.0 V. Evidentially, in comparison to GP, GP5C, and GP15C, the CV curve of GP10C occupies the larger area, and it belongs to nearly rectangular shape, implying the electrical double-layer (EDL) capacitive behavior of this electrode with higher SC value [52]. Figure 8b represents the GCD curves of all the films recorded at 1 Ag −1 in the potential range − 0.9 to 0.0 V. Furthermore, similar to CV results, the charge/discharge curves being nearly triangular in shape also verify the electrical double-layer capacitor (EDLC) behavior of the film electrodes.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Free-Standing Flexible rGO/MWCNT Films for Symmetric Supercapacitor Application

Kumar

Sharma

et al. 2019

Nanoscale Res Lett

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Herein, we report a novel, simple, and cost-effective way to synthesize flexible and conductive rGO and rGO/MWCNT freestanding films. The effects of MWCNT addition on the electrochemical performance of rGO/MWCNT nanocomposite films are investigated in some strong base aqueous electrolytes, such as KOH, LiOH, and NaOH via three-electrode system. The supercapacitor behavior of the films is probed via cyclic voltammetry, galvanostatic charging-discharging, and electrochemical impedance spectroscopy. The structural and morphological studies of the films are performed by X-ray diffractometer, Raman spectrometer, surface area analyzer, thermogravimetric analysis, field emission scanning electron microscope and transmission electron microscope. The rGO/MWCNT film synthesized with 10 wt% MWCNTs (GP10C) exhibits high specific capacitance of 200 Fg −1 , excellent cyclic stability with 92% retention after 15,000 long cycle test, small relaxation time constant (~ 194 ms), and high diffusion coefficient (7.8457 × 10 −9 cm 2 s −1 ) in 2 M KOH electrolyte. Furthermore, the symmetric supercapacitor coin cell with GP10C as both anode and cathode using 2 M KOH as electrolyte demonstrates high energy density of 29.4 Whkg −1 and power density of 439 Wkg −1 at current density 0.1 Ag −1 and good cyclic stability with 85% retention of the initial capacitance at 0.3 Ag −1 after 10,000 cycles. Such a high performance of the GP10C film in the supercapacitor can be ascribed to the large surface area and small hydration sphere radius and high ionic conductivity of K + cations in KOH electrolyte.

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Section: Resultsmentioning

confidence: 99%

Synthesis of Free-Standing Flexible rGO/MWCNT Films for Symmetric Supercapacitor Application

Kumar

Sharma

et al. 2019

Nanoscale Res Lett

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“…Devido ao fator físicoquímico favorável e propriedades eletroquímicas do imidazólio, piperidínio, e líquidos iônicos à base de pirrolidínio, [30] [31]. Os líquidos iônicos com base nos grupos de cadeias laterais de alcoxialquil ou substituintes fluoroalquil tipicamente têm menos viscosidade em comparação com líquidos iônicos dialquil substituídos [33], enquanto a massa molecular dos líquidos iônicos correspondentes é minimamente alterada devido a Brazilian Journal of Development, Curitiba, v.8, n.1, p. 1865-1879 jan. 2022. esses substituintes. Além disso, o elétron retirando substituintes alcoxialquil e fluoroalquil, devido ao seu efeito de redução de energia [34][35], seria esperado para mostrar aumento moderado nos potenciais de oxidação devido o eletrólito e líquido iônico, que complementariam os cátodos CFx com ótimas faixas de tensão [36].…”

Section: Histórico Acerca De Estudos De Líquidos Iônicosunclassified

Líquido iônico no eletrólito para aumento da Eficiência na condutividade elétrica em baterias: uma revisão crítica / Ionic liquid in electrolyte for Increasing the efficiency of electrical conductivity in batteries: a critical review

Ferasso¹,

Oliveira²,

Schaeffer³

et al. 2022

BJDV

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A procura de novas tecnologias de dispositivos de armazenamento de energia e a melhoria das já existentes devido à diversificação da rede energética e à eficiência energética, incentivam a investigação e o trabalho na área da condutividade eléctrica. As experiências com electrólitos líquidos iónicos resultaram num aumento da condutividade, e no melhor desempenho em gamas definidas. Mostrando ser um caminho para uma nova geração de baterias e condensadores.

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“…Fig.5(a) depicts the CV curves of as synthesized rGO and NBG in the potential range 0.9 to 0.0V at a scan rate of 50 mVs -1 . In comparison to rGO, NBG exhibits larger CV area, indicating higher specific capacitance for NBG sample(22). The comparison of specific capacitances calculated from CV curves using equation (1) as a function of scan rates for both the samples is shown in Fig.5(b).…”

mentioning

confidence: 99%

Electrophoretic Deposition of Nitrogen-Boron Co-Doped Graphene as High Performance Electrode for Next Generation Supercapacitors

Kumar¹,

Kumar²,

Singh³

et al. 2018

ECS Trans.

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In this study, we report the electrophoretic deposition (EPD) of nitrogen-boron co-doped graphene (NBG) synthesized via simple hydrothermal method and subsequent annealing at 750℃ in reducing environment. The structural, chemical-compositional and morphological investigations of the as synthesized NBG have been investigated using X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). The electrochemical properties of the samples have been studied via cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) cycling and electrochemical impedance spectroscopy (EIS) in a conventional three-electrode system using 6M KOH aqueous electrolyte. The EPD grown binder free NBG electrode exhibits high specific capacitance of 217 Fg -1 at the scan rate of 5 mVs -1 which is about 1.2 times higher than the specific capacitance (180 Fg -1 at 5 mVs -1 ) of pristine reduced graphene oxide synthesized via similar approach. Furthermore, this sample exhibits excellent rate capability, and ~103% retention after 8800 successive charge-discharge cycles at 1 Ag -1 .

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Energy storage performance of hybrid aqueous supercapacitor based on nano-Li2MnSiO4 and activated carbon

Cited by 11 publications

References 42 publications

Synthesis of Free-Standing Flexible rGO/MWCNT Films for Symmetric Supercapacitor Application

Synthesis of Free-Standing Flexible rGO/MWCNT Films for Symmetric Supercapacitor Application

Líquido iônico no eletrólito para aumento da Eficiência na condutividade elétrica em baterias: uma revisão crítica / Ionic liquid in electrolyte for Increasing the efficiency of electrical conductivity in batteries: a critical review

Electrophoretic Deposition of Nitrogen-Boron Co-Doped Graphene as High Performance Electrode for Next Generation Supercapacitors

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